CVE-2021-41110 CRITICAL

CVE-2021-41110: CWL Viewer: deserialization of untrusted data can lead to complete takeover by an attacker

Vendor Common-Workflow-Language
Product cwlviewer
Weakness CWE-502 · Unsafe deserialization
Published October 1, 2021
Last update August 4, 2024
View on NVD All CVEs

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

What the vulnerability does

01Description

cwlviewer is a web application to view and share Common Workflow Language workflows. Versions prior to 1.3.1 contain a Deserialization of Untrusted Data vulnerability. Commit number f6066f09edb70033a2ce80200e9fa9e70a5c29de (dated 2021-09-30) contains a patch. There are no available workarounds aside from installing the patch. The SnakeYaml constructor, by default, allows any data to be parsed. To fix the issue the object needs to be created with a `SafeConstructor` object, as seen in the patch.

Key dates

02Disclosure timeline

October 1, 2021 CVE published
August 4, 2024 Record updated